const Koa = require('koa');
const app = new Koa()

const main = ctx => {
  const n = Number(ctx.cookies.get('view') || 0) +1
  ctx.cookies.set('view', n)
  ctx.response.body = n + 'view'
}
app.use(main)

app.listen(3000, () => {
  console.log('服务器启动ing');
})